Spatial and temporal characteristics of PM2.5 and source apportionment in Wuhan

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Hao, Hanzhou^1,2,3 ; Guo, Qianqian^1

Resources and Environment College, Hubei University of Science and Technology, Xianning, Hubei

437100, China^1

Land and Water Resources Research Center of the Middle Yangtze River, Xianning, Hubei

437100, China^2

Xiannina Environmental Protection Monitoring Station, Xianning, Hubei

437100, China^3

关键词: Biomass combustion;    Inductively coupled plasma mass spectrometries (ICPMS);    Matrix factorizations;    PM2.5 concentration;    Secondary aerosols;    Source apportionment;    Temporal characteristics;    World Health Organization;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/3/032019/pdf
DOI  :  10.1088/1755-1315/121/3/032019

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to study the pollution characteristics and sources of PM2.5, the PM2.5 in Wuhan atmosphere was sampled continuously. Inductively coupled plasma mass spectrometry (ICP-MS) were employed to measure Na, K, Mg, Ca, Al, Mn, Cu, Zn, As, Pb, Cr, Ni, Co, Cd, Fe, V, Ti, Hg, Si, while water soluble ions (Cl-, NO3-, SO42-) as well as carbonaceous mass (EC and OC) were analyzed using ion chromatograph(IC) and carbon analyzer, respectively. The results show: (1) In 2014 and 2015, Wuhan PM2.5 values were 81.4μg/m3and 69.2μg/m3respectively far exceed the national standard level 2, i.e. annual average 35 μg/m3in China, annual average limit 10 μg/m3by the World Health Organization, the annual limit of 15 μg/m3in the United States. (2) Taking Huaqiao and Qihao as research points, the Spring Festival effect of PM2.5 in Wuhan city is analyzed. It shows that the concentration of PM2.5 in 2014 and 2015 is before Spring Festival> during Spring Festival> after Spring Festival. As a backdrop, during the Spring Festival, Qihao PM2.5 concentration than Huaqiao average low 20 μg/m3. (3) The results of positive factor matrix factorization (PMF) analysis show that PM2.5 in Summer in Wuhan mainly comes from the automobile source, soil dust source, biomass combustion, industrial source, secondary aerosol source, combustion coal source, the contribution rate is 37.7%. 25%, 16.4%, 8.1%, 6.5%,6.4%, respectively.